Extraction of Copper from Technogenic Water by the Method Galvanic Coagulation
Technogenic water of ore mining enterprises,nonferrous metals operations,the enterprises of electroplating and instrument making,containing copper in the form of those or other connections can serve as perspective sources on receiving the copper-beating raw material.Extraction of copper from the given water also solves a problem of water treating from a toxic component that reduces environmental loadat evacuation of water in an open basin.The method of case hardening allows extracting copper selectively with reception of a deposit with the content of copper up to 70%.Weakness of the method is its efficiency basically in acid reduction,and also its low degree of copper extraction.On the basis of case hardening the method of galvanic coagulation is devised.It is based on the work of a short-circuited galvanic cell of iron-coke at variable contact of coupled metals components among themselves,cleared by the oxygen of air.The following processes of galvanic coagulation are considered: ·Extraction of copper; ·Formation ferrites of copper; ·Copper sorption on just-aggregated oxide forms of iron.Establishing conditions for passing the given stages provides an opportunity of copper extraction from technogenic water at any value of pH,content of salt and concentration of copper with reception of a compact deposit from which it is possible to extract copper by the known ways of enrichment and metallurgy.Investigations on optimization and intensification of galvanic coagulation with the purpose of reception the maximum rich deposit on copper have shown that the average contents of copper in a solution of 100～200 mg/dm3 the contents of copper in a deposit is 6%～10% at extraction 85%～90%,depending on characteristics of treated technogenic water.Using methods of scanning microscopy it is determined structures,composition and mechanism of phase formation in investigated electrochemical process.The second stage of galvanic coagulation increases a degree of copper extraction up to 98%～99% that allows returning the cleared waters in circulation for waste recycling or evacuation in an open basin.Nowadays the method of galvanic coagulation is the most acceptable for copper extraction from technogenic water both from the point of view of efficiency and instrument setting that allows applying the method in conditions of the working enterprises.
Technogenic water Galvanic coagulation Extraction of copper
V.A.Feofanov F.A.Dzjubinsky I.V.Shadrunova N.N.Orehova
Treatment with KazMECHANOBR Institute,Kazakhstan GIPROMEZ,Russia Magnitogorsk state technical university,Russia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3971-3977
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）